Fernando casablancas



7 June 17, 1930.

F. CASABLANCAS L765J27 DRAWING MECHANISM FOR TEXTILE ROVINGS Filed April 4, 1929 IrwenZ'or- F aqs'ad Zwwew flabrnezga ,linne l7, E9361 res FERNANDO CASIQA'NCAS, 01E SABADELL, SPAIN DRAWING MECHANISM FOR TEXTILE ROVING$ Application filed April 4, 1929, Serial No. 352,521, and in Spain April 17, 1928.

-which there are combined two endless belts which conduct the roving to the drawing cylinders. These mechanisms are constituted essentially by two endless belts driven by two to motive cylinders and guided by guiding rods or cylinders of smaller diameter, in such a manner that the two belts are in contact during a part of theirtravel and the roving which passes between both of them is controlled or held by them and, following their movement, is conducted to the drawing cylinders. Tn these mechanisms the belts retain all the fibres of the roving which have not already been seized by the air of drawing cylinders, thus preventing them from being dragged along by the fibres which have already been seized by said drawing cylinders. In such mechanisms use is generally made of a frame which guides the belts laterally in this frame carries cylindrical rods of fixed position encased in slots inthe lateral plates of the frame, said rods acting as non-rotatory guiding cylinders for the belts.

Now experience has shown that in the normal case when such guiding rods of the belts are arranged within the front loop of the belts, it is very convenient to be able tovary the distance between the two guiding rods so as to graduate the pressure which is exerted by the belts upon that part of the roving which is comprised between them and so as to be able to adapt such pressure to the class of fibre which is being handled.

The effect which is achieved byvarying the distance between the guiding rods isthat the less the distance apart is, the greater will be the pressure which is exerted by the belts upon the roving and, at the same time, the greater is the distance through which the belts and roving are in contact, the consequence of which is that the point at which the belts deliver the roving to the drawing cylinders is advanced closer to the cylinders. On the con trary the greater the distance between the gulding rods 15, the less will be the pressure exerted by the belts and their contact is of less extension, and the roving is consequently delivered at a greater distance from the drawing cylinders. The distance between the guiding rods must be, however, always substantially greater than the thickness of the two belts together, as otherwise, the two rods would stop-the functioning of the belts in a 7 regular manner.

As these drawing mechanisms have so far been constructed in suchwise that each one of the guide rods is located in a slot in the lateral'plates of the frame, it has been impossible to vary the distance or space between the guide rods without, at the same time,

changing the frame. This solution is not practical in the majority of cases, due to the amount of time and labour, which is relatively speaking considerable, needed for chang ing the frames of the machines.

The improvement forming the subject matter of this invention permits the variation with great facility of the space or distance between the guide rods according to the class of fibre which is going to be treated without having to change the frame or the drawing mechanism.

The improvement forming the subject'matter of this invention consists essentially in arranging'the two guide rods to form one single Ell-shaped piece and mounting this piece in the frame in such a manner that it can be easily changed for another, the rods of which are at the same or at a different distance apart, in suchwise that by merely changing the piece constituting the guide rods, without touching any other element of the drawing mechanism, said mechanism can be adapted to the class of fibres and to the type of work to be carried out at the time.

In order to facilitate this operation still further the piece forming the pair of guide rods may be provided with a handle-like por tion so as to facilitate its manipulation.

- The difierences in the distance apart of the guide rods are relatively speaking small, for example one or two millimeters, and so that this distance apart may be easily known the unitary pieces of the invention can be painted or enameled in different colour according to the space existing between the rods. In the accompanying drawing there is shown a drawing mechanism of this type provided wit-h the improvement forming the subject of this invention. In said drawing:

Figure 1 is a lateral elevation of the mechanism, excluding the drawing. cylinders.

Figure 2 represents the same mechanism in front elevation, that is to say, the part I where the belts deliver the roving to the drawing? cylinders. i

igures 3 and 4 are modifications in the form of the U-shaped element which constitutes the guide rods for the belts, and I Figure 5 is a diagram on a larger scale showing the influence which the space between the guide rods has upon theconducting of theroving to the drawing cylinders.

The drawing mechanism, of a type already known, is composed of a frame formed by two lateral plates 1, 2 braced together by means of transverse members 10 and 11, the latter having, furthermore, for its object to guide the roving fibres for its entrance into the drawing mechanism. This frame rests upon rollers 5 and 6 which actuate two endless belts 3 and 4 which conduct the roving to the drawing cylinders, not shown in Figures 1 and 2. The foremost parts of said belts 3 and 4 areguided by two rods or guiding cylinders 8 and 9 which are non-rotary and arranged within the front loops of the belts. According to the improvement forming the subject matter of the present invention the two guide rods 8 and 9 are so made as to form one single U-shaped piece, as shown in Figures 1 and 2, which piece is supported in the frame by its lower rod 9 being located in a notch 13 in the frame, whilst the upper rod 8 is simply placed against theupright part 16 of the same frame. The said belts 3 and 4 hold the piece 8, 9 against the front edge of the frame and the slot 13 thereof prevents A Order also to avoid displacement in a trans- Verse direction of said piece 8, 9 the lower rod 9 has its end 15 bent downwards, thus preventing displacement towards the .left of Figure 2. I i

y L This arrangement permits with the greatest ease of the putting on and taking off of the guide rods 8, 9 as the U-shaped piece is simply applied against the frame and held by the said belts in suchwise that, bypu lling the curved part, it can be retracted towards the left of Figure2. It is thus possible, with great ease and rapidity, to substitute the piece 8, 9 by another of different dimensions.

6()- In orderto facilitate still more this operat1on of mounting and removing the guiding rods 8, 9 the piece formingthemcan be given the forms shown in Figures 3 and '4. 4

In the case of Figure 3 the piece 8, 9 has I soldered or otherwise joined to its curved the said piecefrom slipping vertically. In

part a rod 18 directed upwards which is formed like a handlefor easy handling and, in the case of F igure 4 this handle is prolonged farther to form a horizontal bar 19.

In any case according to the arrangement of.

the machine, or according to the circumstances under which the-mechanism is ap plied, there may be selected either the one or the other ofthese forms, but the arrangement of this handle or prolongation 18, 19

always facilitates materially the retraction.

ter of this invention permits of having an assortment of pieces 8, 9 with different distances between the guide rods and, in each case, of selecting that distance which is most suitable for the .Work to be done, as the apparatus can thus be easily graduated to do a definite class of'work or a determined piece of work, without having to vary to the slightest degree the frame and neither the cylinders nor the belts.

In Figure 5 there is shown diagrammatically the effect produced in themechanism by varying the distance between the two guide rods 8, 9. When the rods 8, 9 have a relatively great distance between them the belts 3, 4 each form in the front part a curve of larger radius and the belts separate at the point 20 for example. O n the contrary if the distance between the two rods is decreased, as in the case of the rods 80, 90, shown by dotted lines in the said Figure 5, the belts take up the positions 30, 40 forming curves of smaller radii and they are in contact with each other up to the point 21. This gives rise .to two results: In the first place the pressure which is exerted by the belts against each other increases and, consequently, there is an increase in the retention exerted by these belts upon the fibres and, in the second place, the belts accompany the roving for a greater distance and, consequently, the distance from the point at which the belts abandon the roving up to the point where it is seized by the drawing cylinders 22 will be less. This variationof the distance between the rods 8, 9 can be carried out as shown in Figure 5 by increasing the diameter of these'rods or else, if so desired, the same diameter can be retained bynarrowing the distance Hetween the two rods 8, 9.

These differences in the spacing apart of the members 8, 9, are very-small, for example one millimeter or two, so that, in practice, it would be diflicult to distinguish one type of members from another. In order to facilitate this, these members or pieces can be painted or enameled in different colours according to the distance between the guide rods.

I claim:

1. A drawing mechanism for textile rovings provided with endless belts, having in combination a frame which guides two belts laterally and two guiding rods supported on said frame which guide internally the front loops of the belts, said two guiding rods being united forming one single U-shaped piece in order that the distance apart of the rods may be invariable and that the rods can be easily retracted from the frame.

2. A drawing mechanism for textile rovings with endless belts having a guiding frame for the belts and two guiding rods forming a single U-shaped guide the front loops of the belts, said U- shaped piece being provided with a handle like element directed upwards to facilitate the catching hold and placing it upon or withdrawing it from the mechanism.

3. A drawing mechanism for textile rovings with endless belts having a guiding frame for the belts and two guiding rods forming a single U-shaped piece to internally guide the front loops of the belts, said U- shaped piece having its lower rod or branch bent at the end in order that when once placed in position the piece cannot loosen itself from the mechanism.

4. In a drawing mechanism for textile rovings with endless belts having a guiding frame for the belts and a plurality of U- shaped pieces forming two guide 'rods for the front loops of the two belts, the arrangement of having said U-shaped pieces painted or enamelled of distinct colours according to the distance apart of the rods of each piece.

5. In a drawing mechanism, side plates having notches therein, rolls carried by said side plates, belts trained about said rolls and a unitary demountable piece composed of two spaced rods adapted to be mounted crosswise of said side frames and through the belts, one of said rods engaging in the notches of the frame and the other of the rods abutting against upright portions of the frames.

6. In a drawing mechanism, side plates having notches therein, rolls carried by said side plates, belts trained about said rolls, and a unitary demountable piece composed of two spaced rods adapted to be mounted crosswise of said side frames and through the belts, one of said rods engaging in the notches of the frame and the other of the rods abutting against upright portions of the frames, one of said rods having an angularly bent free portion for extending beyond the adjacent side plate and acting to retain the piece in position in the plates, and a hand piece to internally of different widths, each one f, piece composed of vertical and horizontal members secured to said rods.

In testimony whereof I have signed my name to this specification.

FERNANDO C ASABLANCAS. 

